Malicious PDF — malware analysis report

Static analysis result for SHA-256 5127317042805521…

MALICIOUS

PDF

72.8 KB Created: 2021-01-02 13:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3887cd975c503075befd9874a1715660 SHA-1: dbb1eb01284cd0fbb87ad935c94bbe66b1159aa4 SHA-256: 5127317042805521da3cba6b0e6c968fb0ffe207bed5d9fe738887bbb357b43d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/123?utm_term=wrights+silver+cream+target PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/Xw4hiUg/bluetooth_alarm_clock_radio_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/WghLphc/36901596031.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/Igeihsw/neogeo_mini_international_console_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kigifadarija/JMmNvhf/tapakosawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5fac1771a5bc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_5feb00ff48ea5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/bay_news_9_former_anchors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe57a11-9ad8-41cb-b9b9-30f53da63743/silent_ringtone_for_iphone_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921ab7b3-1636-404a-949f-65fe948a2c2f/17930517352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bf5db0-1c87-4094-8105-c24a5d7aaaf6/geassassin_99_letra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84a9bc3-cd2b-4369-a861-46f0b7010dea/woodhaven_horizontal_router_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb08ae10-c5e3-47a5-873e-9603e85eb412/zeleverabafi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 4856 bytes
SHA-256: b4ef08ddaa68f9cfc788e4151e91455b357cd8d0acdd03048e25fb5c48ef1c4c
font_01_sfnt_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 10412 bytes
SHA-256: b966841a7ffb87997496320740a96ed3bd038337ca5a86df26bb5899de584f27
font_02_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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